. >> brown: those zingers from ronald reagan that wounded jimmy cartener 1980. in the documentary "debating our destiny" jim went back to talk to candidates about their experience of the debates and had the chance to ask whether they prepared famous lines ahead of time. >> lehrer: i asked ronald reagan about, "there you go again," and a couple of others. "no, no, it just came to me." >> no it just seemed to be the thing to say and what he was saying up there. >> brown: did you believe him? >> lehrer: i don't know if i did or i didn't. i found it interesting that nobody wants to admit. >> brown: another major moment came in 2000 with vice president al gore rolling his eyes and loudly sighing during his debate with then-texas governor george w. bush. the whole world knew it,Ñi excet for the third man on the stage that night inÑi boston. >> you didn" know it was happening. >> lehrer: i didn't know it because under my personal rules, i ask candidatasm a question, ii look only at candidate a. i never look atÑi candidate b., because i don't want to be involved in